Table 4. Estimates of association from weighted logistic regression models to predict the risks of HbA1c ≥ 5.7% or ≥ 6.1% in Korean adults without diabetes (n = 10,241).

	For HbA1c ≥ 5.7%		For HbA1c ≥ 6.1%
	Odds ratio (95% CI)	p	Odds ratio (95% CI)	p
Age (10 year increase)	1.52 (1.45–1.59)	<0.001	1.65 (1.53–1.77)	<0.001
Men	0.88 (0.71–1.08)	0.203	0.68 (0.50–0.91)	0.009
Heavy alcohol drinking	0.48 (0.37–0.64)	<0.001	0.42 (0.28–0.63)	<0.001
Waist circumference (5cm increase)	1.15 (1.10–1.19)	<0.001	1.20 (1.14–1.26)	<0.001
College graduation	0.95 (0.82–1.10)	0.482	1.18 (0.91–1.53)	0.211
Smoking		<0.001		<0.001
Never smoking	reference		reference
Ex-smoking	0.96 (0.78–1.17)	0.675	0.83 (0.62–1.12)	0.228
Current smoking
<15 cigarettes/day	1.29 (1.04–1.60)	0.002	1.21 (0.82–1.78)	0.334
≥ 15 cigarettes /day	1.84 (1.41–2.41)	<0.001	2.36 (1.58–3.52)	<0.001
Hematocrit (2% increase)	0.94 (0.90–0.99)	0.011	0.93 (0.87–1.00)	0.041
Fasting plasma glucose (1mmol/l increase)	3.72 (3.29–4.21)	<0.001	8.66 (7.24–10.35)	<0.001

All odds ratios were from weighted analyses.